Question 678 Deck Safety

The correct answer is D) at the highest point. The reason for this is that in battery charging rooms, the exhaust ventilation should be provided at the highest point to effectively remove the potentially explosive hydrogen gas that can build up during the battery charging process. Hydrogen gas is lighter than air and will accumulate at the highest point in the room, so the exhaust ventilation needs to be located there to properly vent the gas and prevent any hazardous accumulation. The other options are incorrect because: A) the lowest point would not effectively remove the hydrogen gas; B) near the batteries may not be the highest point; and C) the ventilation should be provided continuously, not just when charging is in progress, to maintain a safe environment.